The recent FO variant of classic controller design includes an order parameter that changes the control effect of this operation. Lord Kelvin’s brother James Thomson invented a mechanical component with a constantly spinning disk and a ball (15[1])which accomplishes this operation (15[1])in mechanical (-5[1])computers. (15[1]-5[1])One control effect (15[2])can be found using this operation applied to the (*) past values of the setpoint (10[1])minus (10[1])process variable error. This operation (-5[1])can be accomplished by an op-amp circuit (10[1])which feeds its voltage output (10[1])back (-5[1])to its input (10[1]-5[2])through (-5[1])a feedback capacitor. This is the common operation (10[1])applied to the exponential (10[1])kernel that changes analysis of a circuit between the frequency (-5[1])and time domains (10[1]-5[4])in the Laplace (-5[4])and Fourier transforms. (10[2]-5[1])For (10[2])10 points, name this operation which for PID controllers is represented by the I (10[3])and is the opposite of differentiation. (10[5])■END■ (10[20]0[1])